Radio dial and log



June 17, '1930. c; WATSON n 1,764,814

RADIO DIAL AND LOG 'iied Feb. 21. 192s gf C@ @e Patented June 17, 1930 PATENT OFFICE.

CHARLES LEE WATSON. or STRAWN, TEXAS RADIO DIAL ANT: Loe

Application l'ed February 21, 192?. Serial No. 341,761.

This invention relates to'new and useful improvements in. radio devices, and,` particularly to dials and logs therefor.

One object of the invention is to provide Y. a simple device by means of which the operator may turn the knob of the tuning device of the set, until the call letters of a desired station appear through an opening in the panel of the set. Another' object isfto provide a device of this character which is simple in construction, easy to operate, and which is accurate and effective in its use. r

Other objects and advantages will be apparentfrom the following description when taken in connection with the accompanying drawing.

In the drawing:

Figure 1 is a front elevation of a portionl of the panel of a radio receiving set, showing the dial and log through the opening therelll tion and portions of the receiving set.

Figure 3 is a vertical sectional view on the line 3*?) of Figure 2. p

Figure 4 is a vertical sectional view on the line 4-4 of Figure 3.

Referring particularly to the accompanying drawing, 10 represents a portion of the front panel of a radio receiving set 11, in which is formed a vertical slot 12, having a hair, or very fine wire 13 extending longitudinally and centrally therein. Mounted on the base 14, of the set 11, immediately in rear of the panel 10, and the said vertical slot 12, is a vertical stub shaft 15. A horizontal disk 16, having a central opening 17, and a tube 18 rising from one face of the disk in surrounding relation to said opening, is-disposed on the said shaft 15, as shown in the drawing. Disposed in the upper end of the ltube 18 is the depending stub shaft 19, formed on the lower end ofthe cylinder 20a, a set screw 20 being engaged throughy the said tube 18 for engagement with said shaft 19, whereby to hold the cylinder and disk together for simultaneous rotation, and whereby the disk and tube will rotate on the stub shaft 15. Formed on the Figure 2 is a top plan view of the inven' lower end of the cylinder is a small circumferential flange 2l, which is spaced from the face of the cylinder to form a receptacle in Vwhich is received the lower edge of the sheet 22, 011 the outer face of which are printed the call letters of various broadcasting stations, and a mark which is adapted to be brought into juxtaposition with the hair or wire of the panel slot. The upper end of the sheet 22 is held in place on the 6o cylinder by means of the spring band 23. Disposed through the panel, adjacent the shaft 15, is the horizontal shaft 24 of the control of the set, said shaft having the knob 25 on its outer end, outwardly of the panel, 65 and a disk 26 thereon, inwardly of the panel. A pin 27 projects from the peripheral face of the disk 16, while a similar pin 28 projects from the periphery of the disk 26. Engaged around the said disks 16 and 26, and 70 is the belt 29, said belt having suitable open ings for receiving the pins of the disks, whereby to prevent slipping of the belt and to insure the proper driving action between the disks. It will be noted that there is a line drawn around the' upper end portion. of the sheet 22, and that' degrees are markedV along said line, with numbers above the line representing wave lengths, in meters, or kilocycles. It will further be noted that the station call letters are at points vertically downward from different degree marks of the line, which correspond to the kilocycles at which the particular stations are operating. Beneath each of the sets of call letters. is a horizontal line with a central point directed downwardly, and when the drum or cylinder 20 is rotated, the operator makes sure that this central point is in direct line with the hair or wire of the panel slot. The -drum is adapted to be rotated, `when the operator turns the knob 25- to tune in the desired station, until the call letters of the station appear in the slot 12.

Attention is directed to the fact that the l disks 16 and 26 are of the same diameter` so that the cylinder 20, and the shaft 24 rotate at identical speeds, with the result that condensers operated-by the shaft, will be operated at the same degree as the cylinder, 1.

with the result that the proper station call letters Will appear in the, slot 12.

What is claimed is:

In an indicating device for a radio receiving set, the combination with the condenser actuating shaft, of a vertical stub shaft mounted adjacent the actuating shaft, a disk having an integral tubular portion disposed for rotation on said stub shaft, a vertical drum having a depending stub shaft removably secured within said tubular portion for rotation with said disk, the lower end of the drum having a peripheral upstanding flange spaced from the face of the drum, a sheet of flexible material eny gaged around the drum with its lower edge retained between the drum and flange, a resilient band retaining the upper end portion of the sheet, and operative driving connections between the said actuating shaft and the drum shaft.

ture.

CHAS. LEE WATSON.'

In testimony whereof I affix Iny signa-l 

